Thanks to Gerry Gill for finding the patent for this ingenious device that combined a damper regulator with a pressure gauge, water gauge, safety device. It was issued to B.R. Doody for low pressure steam and analogous systems in 1909.
This document contains the complete illustrated instructions for installing the Hercules Steam and Hot Water Heating System, a boiler manufactured by Sears, Roebuck and C...
This document contains the manufacturer's instructions for the HB Smith Series M450L Mills Water-Tube Boiler for automatic firing with oil or gas (Steam, Vapor, or Water ...
This document contains the jacket assembly instructions for the HB Smith Series 45 Mills Boiler (circa 1979).